How can i create an action that opens a file and saves as a WEBP and use as Batch

ĆI have tried to do this action before and it worked... but only for one file. Ć

Expand and take a look at Save step. You probably have recorded exact path and file name in action step what is causing action to always write file in the same folder with the same name what is causing overwriting.

You can use the script that I created for the following topic thread:

https://community.adobe.com/t5/photoshop-ecosystem-discussions/script-save-webp-with-active-layer-name/td-p/12399496

 

The script can be recorded as a single step into an Action, then used with the Batch command. Changes may need to be made as it was not written for batching.

 

It uses the active layer and name to save, but that could be changed if required. It uses the following plugin:

https://github.com/webmproject/WebPShop

https://helpx.adobe.com/photoshop/kb/support-webp-image-format.html

 

Here it is with an Action/Batch, tested, it works: